* {
    margin: 0;
    padding: 0;
}
a{
    color:#757575; 
}
u,a {
    text-decoration: none;
}

li {
    list-style: none;
}
em,i{
    font-style: normal;
}
strong,b{
    font-weight: normal
}
/* 兼容低版本游览器 */
.clear-fix{
    zoom:1
}
/* 万能清除浮动 */
.clear-fix::after{
    content: '';
    display: block;
    width: 100%;
    height: 0;
    overflow: hidden;
    visibility: hidden;
}
/* 清除input外框 */
input{
    outline: none;
}
/* 解决img图片边框bug */
img{
    border: none;
}


.span1,
.span2,
.span3,
.span4,
.span5,
.span6,
.span7,
.span8,
.span9,
.span10,
.span11,
.span12,
.span13,
.span14,
.span15,
.span16,
.span17,
.span18,
.span19,
.span20 {
    float: left;
    margin-left: 14px;
    min-height: 1px;
}